Joseph henry killey



(ModeL) 2 Sheets-Sheet 1. J. H. KILLEY.

LOW PRESSURE INJECTOR.

Patented May 28, 1889.

WITNESSES: 2

%g@ a J W i\ Nv PETERS Flmhrlilhngrapher. Washington. D. c.

(Model) 2 sheet -sheet 2.

J. H. KILLEY.

LOW PRESSURE INJECTOR. No. 404,091. Patented May 28, 1889.

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N. PETERS. mwum n m. Washinglm a a UNITED STATES PATENT OFFICE.

JOSEPH HENRY KILLEY, OF HAMILTON, ONTARIO, ASSIGNOR TO HIMSELF, AND THOMAS WVORSWVIOK, OF TORONTO, CANADA.

LOW-PRESSURE INJECTOR.

SPECIFICATIONforming part of Letters Patent No. 404,091, dated May 28, 1889.

Application filed August 25, 1888. Serial No. 283,753. (Model) To all whom it may concern.-

Be it known that I, JOSEPH HENRY KILLEY, of Hamilton, .in the county of WVentworth, Province of Ontario, and Dominion of Canada, have invented a new and Improved Low- Pressure Injector, of which the following is a full, clear, and exact description.

My invention relates to injectors designed more especially for feeding steam-boilers, and has for its object to provide an injector adapted for operation by low-pressure or exhaust steam, and in emergencies by high steam-pressure also, and having simple parts all easily accessible for examination, cleaning, or repairs, the whole device being very efficient and capable of supplying very hot water to a boiler or other vessel to economize fuel in making or using steam.

The invention consists in certain novel features of construction and combinations of parts of the injector, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a central vertical section of the injector, taken on the line 1 1 in Fig. 2. Fig. 2 is a central vertical sectional elevation taken on the line 2 2 in Fig. 1. Fig. 3 is a sectional plan view taken on the line 3 3 in Fig. 1. Fig. l is a transverse section through the discharge end of the steam-cone, taken on the line 4 4 in Fig. 1; and Fig. 5 is a transverse section through the steam-cone, taken on the line 5 5 in Fig. 2.

The case or body A of the injector is provided with three chambers-an upper one, B, a middle one, C, and a lower one, D. The upper chamber, B, has an inlet-opening at b for connection of an exhaust or low-pressure steam-pipe. The middle chamber, 0, has an inlet, 0, opening to a reservoir or pressurechamber, E, with which is connected a pipe, 6, leading to a pump of any description, which forces water to the chamber E, from which the water passes through the pipe 0 to the in jector-chamber G in a steady stream, regardless of the pulsatory action of the pump. An overflow-pipe, (1, leads downward from one side of the case-chamber D to any receptacle for retaining the overflow. The chamber D is made with a removable side wall, F, which is held securely in place by a set-screw, g, which passes through a bridge piece or plate, G, which has opposite end lugs, g g, hooking behind lugs on the case, and as most clearly shown in Fig. 3 of the drawings. By loosenmg the set-screw the wall F may be removed to give access to the interior of the injector at its discharge end.

Into an opening at the top of the injectorcase is fitted a cap, H, which is preferably held in place by set-screws, as shown. Into this cap is snugly but loosely fitted the stem. 7, of the hollow steam-cone I, which is connected at its top to the stem by a series of three bowed ribs or flanges, t", which give free passage of exhaust or low-pressure steam from the supply-pipe b and the chamber B to and through the cone. The use of three ribs 2' to connect the cone-body with its stem s important, as they prevent the steam takmg a spiral or whirling course, and consequently allow or assure its passage through the cone at a greater momentum than it would have were the cone-body and stem connected by but two ribs. More than three ribs 2" may be used, if desired.

The body of the cone I is snugly fitted by a packed joint into an opening, a, in the inector-case, and the small end or nozzle of the cone is passed into the upper conical or tapering end, J, of a mixing or condensin case or chamber, L, which is fitted in n13 lower chamber, D, of the injector-case A, and preferably by an upper packed joint at an opening, a, of the case, and by a plug, Z, at a bottom opening, c of the case, said plug Z being connected with the rigid or immovable half or portion of the cone J by two or more ribs, Z, which allow free flow of water and steam to or from the chamber D and the upper end of a nozzle, M, which is fitted in the base or pluglof the'miXing-case L, and has an upwardly-tapering central opening, m, presenting its smaller end to the smaller end of a downwardly-tapering opening or interior passage, 3', of the cone J. I

The entire case L, comprising the cone J,

ICO

. with a series of radial fins or ribs, i preferably three in number, as shown best in Fig. 4 of the drawings, and which are fitted into the top of the passage j of the cone J, and

effectually center and steady the discharge end of the cone I within the passage j, while allowing free flow of water from the chamber to and through the steam escaping from the cone I. The movable side plate of the cone J s will be hereinafter explained. The bottom plate, N, is provided withan opening,

, n, for connection of a pipe which will convey the hot water from the injector to a steamboiler or other vessel for utilization in making steam or for other purpose, and the bottom plate is also provided with a passage, 7/, to which will be connected a steam or water pressure gage, (not shown,) and which will indicate'without fail if the injector be working properly or is out of order.

The steam-cone I is made adjustable relatively to the mixing-cone J. as follows: The upwardly-extending hub or collar h of the case-cap II is counterbored from the top to receive around the cone-stem t a packing, O, which extends or is bent outward at the top over the hub h, whereat it is held by a nut, P, into which is fitted by screw-threads the cone-stem i, and the nut has a lower flange, 19, onto which presses the upper flange, r, of a gland or packing-nut, R, which is fitted by a screw-threaded joint to the hub h of the cap It is obvious that by tightening the gland the packing will be compressed within and above the hub or collar h to assure a water and steam tight joint of the cone-stem i with the injector-case or its cap H. A nutcollar, S, isscrewed upon the cone-stem 01 above the nut P, and is fixed to the stem by a pin or pins, 3. This collar or nut S serves as a stop against the nut P, to limit the downward movement of the cone I within the mixing-cone J, and prevent damage of the steamcone by contact of its inner end with the mix ing-cone. The collar and cone are shown at their lowermost positions in Figs. 1 and 2 of the drawings. It is manifest that by turning the nut Pby a wrench while it is held to the packing O by the gland R the cone-stem 2' will be moved in the nut-,whereby the steamcone I will be raised or lowered to regulate j the size of the water-passage at T between thedischarge end of it and the walls of the inmost effective working of the device with steam of any available pressure or temperature passing through the chamber B and the cone I to the mixing-cone and chamber J L of the injector, whence the water heated to a high temperature by the steam condensed by and in it will escape through the nozzle M and bottom plate, N, to the pipe and thence to the boiler. If desired, the steam-cone I maybe adjusted to control the water-passage T by applying a wrench to the collar S, which is pinned to the cone-stem.

Figs. 1 and 2 of the drawings show that the steam-cone I is provided at or near the upper part of the injector-case chamber 0 with one or more lateral perforations, U, giving communication between this chamber and the interior steamway of the cone, and whereby water will enter the upper part of the cone from the chamber 0 and mingle with the entering steam to increase its saturation and gravity, and also its propelling or impell'ing force as it acts on the water entering the cone J at the passage T, toincrease the efficiency of the in jector. I also. corrugate the exterior surface of the steam-cone I, preferably by fluting it longitudinally, and therebyincrease the condensing-surface of the cone without interfering with the free onward flow of water to the mixing-cone, as will be understood from Figs. 2 and 5 of the drawings, to cause the inj ector to work more effectively.

' A live-steam pipe, V, is fitted through the stem d of the steam-cone I, and extends toward its discharge end, and whereby the exhaust-steam entering the injector at the passage b may at any time be re-enforced by a live-steam jet from the pipe V, and the exhaust or low-pressure and the live or higher pressure steam will coact to accelerate or assure more effective water discharge from the injector as any unforeseen circumstances or emergency may require. The pipe V will be provided with any suitable valve to control the inlet of live steam to the injector. Iprefer to pass a pin, Q), through the cone-stem i into a longitudinal slot, 7;, in the live-steam pipe V, and thereby prevent the steam-cone I from turning while it is being adjusted by the nut Pto regulate the water-inlet at the passage T above mentioned. The pin 0 also maintains the mouth or outlet of the pipe at practically the same central relation with the steam-outlet of the cone as when the pipe was first fitted to the cone, thereby assuring uni.- form and most effective action of the livesteam jet within or at the nozzle of the cone.

I next describe the movable side plate, W,

of the mixing'cone as follows: For conveninto lugs on the body, and said pins preferably stand or incline downward, and are.

adapted to enterholes formed in lugs on the movable side plate, W, which is provided at its back with a couple of lugs, to, which strike lugs f, formed on the inner face of the removable side plate, F, of the compartment D of the injector-case when the plate XV falls away from the cone-body about a thirty-second of an inch. Movable side plates of this general character have before been used in injectors, but they have usually been hinged at one end to the body of the cone of the mixing case or chamber; but the construction with a sliding plate, TV, as above described, is preferable, as there is a much quicker action in starting the injector, and there is much less danger of the loose side plate of the cone being held open or imperfectly closed by sediment collected at the joint than when the loose plate is hinged. Loose plates of this class on the mixing-cone have one object, which is to allow them to yield or open by water-pressure until sufficient vacuum is established to assure smooth working of the injector,when the plate automatically closes to the fixed part or body of the cone.

The plate 7 would be moved outward by water-pressure alone were its guide-pins w arranged at right angles with the plate-joint; but by inclining the guide-pins the gravity of the plate assists the water-pressure in opening it; hence'the inclined guides or pins are preferred in practice.

I purpose making a connection between the upper exhaust or low-pressure steam-chamber B of the injector and its lower water-outlet V not be applied or used some of the hottest steam entering the injector may be discharged directly into the chamber D to heat the water to a higher temperature than it otherwise would reach. I accomplish this object by arranging a steam bypass, and preferably by casting a cored enlargement, A, on the side of the injector-case A, thereby forming a steam-chamber, X, which communicates at 00 with the chamber B, and at with the chamber D, and is provided with a valve, an, by which the by-passage of steam may be controlled as circumstances require.

It will be understood that the injector will work with exhaust or low-pressure steam only, and in this case the live-steam pipe V will either be dispensed with or the passage of steam through it to the injector will be cut OE, and under these circumstances the injector will be started by admitting at b the exhaust from an ordinary steam-engine or low-pressure steam from any other source. Water is then admitted at the opening a, and the passage T having been regulated as to size or area by adjusting the cone I, as above described, the combined steam and water will it inward to the cone-body. Should the overflow-pipe d be extended downward ten or twelve feet, the injector will raise the overflow water through this pipe, and will start and feed the overflow, together with the water supplied at 0, into the boiler, without the giving way of the loose side plate, WV, of the mixingcone.

When live or high-pressure steam is used in connection with exhaust or low-pressure steam, the operation is as follows: The live steam will first be admitted through the pipe V, and will draw the feed-water to and through the passage T, and the exhaust-steam will then be admitted at the inlet 1), and the combined action of the live and exhaust steam will force the water into the boiler through the plate N and at a greater pressure and higher temperature than would be attained were exhaust or low-pressure steam used alone. It will be noticed that when the plate F is removed the cone plate W may readily he slipped off its guide-pins w, to allow the joint of it with the cone-body to be thoroughly and conveniently cleaned to assure perfect closure of the cone when the vacuum is established. It will also be seen that the arrangement of the steam and mixing cones in the injectorcase allows them to be quickly and easily removed from the case without breaking pipe joints or connections, thus facilitating ad justment, examination, cleaning, and repair of the interior parts of the injector at minimum expense.

I particularly mention the instantaneous starting of the injector, due to the bodily outward movement of the loose side plate, WV, of the mixing-cone; also, the very slight opening of this plate in connection with the steam to start the injector, which enables the injector to start by the aid of the water in the overflow-pipe only; also, the very small quantity of overflow required to start the injector; also, the unobstructed steam-passage, allowing all the steam to be readily taken up by the feedwater to highly increase its temperature and the force of its flow to the boiler against a high pressure therein.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, in an injector, and with a case having three chambers, 13 C D, the first two having steam and water inlets b 0, respectively, a steam-cone fitted at the chamber O and opening to the chamber B, a mixing-cone fitted at the chamber D and receiving the discharge of the steam-cone and the water from the chamber 0, said steam-cone having a screw-threaded stem fitted in the injector-case cap, of a packing fitted to the steam-cone stem and cap, a nut, P, provided with a flange, p, and threaded to the stem beyond the packing, and a gland, R, provided with a flange, 1", adapted to the nut-flange p, and fitted to the cap and holding the nut P, to pack the joint, while allowing rotation of the nut to adjust the steam-cone endwise for 1 regulating the water-supply, substantially as herein set forth.

2. The combination, in an injector, and with its case having three chambers, 13 O D, and steam and mixing cones, and the stem of the steam-cone fitted loosely in the case or its cap, of a nut held to the case and in which the steamcone stem is adjustable, and a collar, as S, fire'l to the cone-stem and limiting the inward movement of the cone, substantially as herein set forth.

3. In an injector, the steam-cone provided at its discharge end or nozzlewith fins or flanges having a hearing at the water-inlet of the mixing-cone, substantially as described, whereby the nozzle of the steam-cone will be centered and steadied by the mixing-cone, as set forth.

4. The combination, in an injector, of a case having three chambers, B C D, the first having steam and water inlets b c, respectively, a steam-cone fitted at the chamber 0 and opening to the steam-chamber B, a mixing-cone fitted to the chamber D and receiving the discharge of the steam-cone and the water from the chamber 0, and said steamcone provided at its nozzle with fins or flanges having a bearing at the water-inlet of the mixing-cone, substantially as herein set forth.

5. In a low-pressure injector, the steamcone provided with a stem fitted adjustably in the injector-case, combined with a live or high-pressure steam pipe passed through the cone-stem and along the cone-body toward its dischargemozzle, substantially as herein set forth.

6. In a low-pressure injector, the steamcone provided with a stem fitted adj ustabl'y in the injector-case, combined with a live or high-pressure steam pipe fitted through said stem and into the cone-body', and said conestem having a pin entering a longitudinal slot of the live-steam pipe, substantially as herein set forth.

7. In an injector, the steam-cone made with a body portion fitted at the water-inlet chamber of the injector-case and a stem passing through the case and adapted for adjusting the cone, and said cone-body connected to the stem by three or more ribs, '5, substantially as herein set forth.

8. In an injector, the combination, with its case having a fluid-chamber, D, of a cone, J, and a connected plug, Z, having a shoulder, Z fitting a recess of the case, a discharge nozzle, M, having a shoulder, m, and fitted to the plug Z, and a bottom plate, N, holding the parts J Z M into the injector-case, substantially as hereinset forth.

9. An injector formed with a fluid-chamber having a hot-water outlet, a mixing-cone held in said chamber and provided. with a loose or movable side plate, and said chamber having a removable side wall adjacent to said plate, substantially as herein set forth.

10. An injector made with a fluid-chamber having a hot-water outlet and a mixing-cone fitted in said chamber and provided with a loose sideplate fitted for direct outward and inward bodily movement on guides held to the cone-body, substantially as herein set forth.

11. An injector made with a fluid-chamber having a hot-water outlet and a mixing-cone fitted in said chamber and provided with a loose side plate fitted for outward bodily movement on downwardly slanting or inclined guides held to the cone-body, substantially as herein set forth.

, 12. An injector made with a fluid-chamber having a hot-water outlet, a mixing-cone in said chamber and provided with a loose side plate fitted for outward bodily movement on guides held to the cone-body, and said side plate limited in its outward movement by contact with the in j ector-case or lugs thereon, substantially as herein set forth.

13. In an injector, the mixing cone or chamber L, made with a cone, J, having a loose bodily movable side plate, W, a plug, Z, connected by ribs Z to the cone J, and a nozzle, M, fitted in the plug Z, substantially as herein set forth.

14:. The injector bottom plate or case formed with two openings, one for connection of a water-discharge pipe and the other for connection of -a pressure-gage, substantially as herein set forth.

JOSEPH HENRY KILLEY.

Witnesses W. J. FRANKS, THOS. WORSWICK. 

